package com.qk.interceptor;

import com.qk.utils.CurrentUserHoler;
import com.qk.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

@Slf4j
@Component
public class TokenInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        String url = request.getRequestURI();
//
//        // 2. 判断是否是登录请求，如果是，放行
//        if(url.contains("login")){
//            log.info("登录请求，放行...");
//            return true;
//        }

        // 3. 获取请求头中的token
        String jwt = request.getHeader("token");

        // 4. 判断token是否为空，为空则返回未登录
        if(jwt == null){
            log.info("请求头token为空");
            response.setStatus(401);
            return false;
        }

        // 5.解析令牌
        try {
            Claims claims = JwtUtils.parseToken(jwt);
            Integer userId = claims.get("id", Integer.class);
            log.info("用户id：{}", userId);
            CurrentUserHoler.setCurrentUser(userId);
        }catch (Exception e){
            log.info("令牌解析失败");
            response.setStatus(401);
            return  false;
        }

        // 6. 放行
        return true;


    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
          CurrentUserHoler.removeCurrentUser();
    }
}
